gstreamer-sharp RAW video appsink memory leak

[Camera.Geomatics at leica-geosystems.com]

Hello

We are trying to pull RAW video frames from appsink, using gstreamer 
sharp.

It looks like the samples are not freed even when calling Dispose() on the 
sample, resulting i a huge memoryleak (~30MB a second....)

Tested with gstreamer 1.8.1 and gstreamer-sharp#HEAD on Ubuntu 14.04 and 
gstreamer 1.4.5 and gstreamer-sharp on Windows.

Any ideas what is wrong at our sample code?

----------------------------

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using Gst;
using System.Runtime.InteropServices;

namespace AppSinkSample
{
    class Program
    {
        static Element VideoTestSource, VideoCaps, VideoSink, AppQueue;
        static Gst.App.AppSink AppSink;

        static GLib.MainLoop MainLoop; // GLib's Main Loop

        // The appsink has received a buffer
        static void NewSample(object sender, GLib.SignalArgs args)
        {
            var sink = (Gst.App.AppSink)sender;

            // Retrieve the buffer
            var sample = sink.PullSample();
            if (sample != null)
            {
                // The only thing we do in this example is print a * to 
indicate a received buffer
                Console.Write("*");
                sample.Dispose();
            }
        }

        static void Main(string[] args)
        {
            // Initialize Gstreamer
            Gst.Application.Init(ref args);

            // Create the elements
            VideoTestSource = ElementFactory.Make("videotestsrc", 
"videotestsrc0");
            VideoCaps = ElementFactory.Make("capsfilter", "capsfilter0");
            AppQueue = ElementFactory.Make("queue", "app_queue");
            AppSink = new Gst.App.AppSink("app_sink");
 
            // Create the empty pipeline
            var pipeline = new Pipeline("test-pipeline");

            if (VideoTestSource == null || VideoCaps == null || AppQueue 
== null || AppSink == null)
            {
                return;
            }

            // Configure videotestsrc
            VideoTestSource["pattern"] = "snow";
            VideoCaps["caps"] = 
Gst.Caps.FromString("video/x-raw,width=640,height=480");

            // Configure appsink
            AppSink["emit-signals"] = true;
            AppSink.NewSample += NewSample;

            pipeline.Add(VideoTestSource, VideoCaps, AppQueue, AppSink);

            if (!Element.Link(VideoTestSource, VideoCaps) || 
!Element.Link(VideoCaps, AppQueue) || !Element.Link(AppQueue, AppSink))
            {
                return;
            }

            // Start playing the pipeline
            pipeline.SetState(State.Playing);

            // Create a GLib Main Loop and set it to run
            MainLoop = new GLib.MainLoop();
            MainLoop.Run();

            // Free resources
            pipeline.SetState(State.Playing);

        }
    }
}


----------------------------

Regards
blad